Avaya Configuring OSI Services User manual

Category
Routers
Type
User manual
Configuring OSI Services
Router Software Version 10.0
Site Manager Software Version 4.0
Part No. 112947 Rev. A
January 1996
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v
Contents
About This Guide
Audience ..........................................................................................................................xiii
Before You Begin .............................................................................................................xiii
Bay Networks Customer Support ....................................................................................xiv
CompuServe .............................................................................................................xiv
InfoFACTS ................................................................................................................. xv
World Wide Web ........................................................................................................ xv
How to Get Help .............................................................................................................. xv
Conventions .....................................................................................................................xvi
Ordering Bay Networks Publications ..............................................................................xvii
Acronyms ........................................................................................................................xvii
Chapter 1
OSI Overview
OSI Basic Reference Model ...........................................................................................1-2
OSI Network Organization ..............................................................................................1-3
Level 1 and Level 2 Routing .....................................................................................1-4
Level 1 Routing ..................................................................................................1-5
Level 2 Routing ..................................................................................................1-6
OSI Network Addressing ..........................................................................................1-6
NSAP Structure .................................................................................................1-7
Allocating NSAP Addresses ............................................................................1-13
OSI Basic Routing Algorithm ........................................................................................1-17
Update Process ......................................................................................................1-18
Decision Process ...................................................................................................1-20
Forwarding Process ...............................................................................................1-21
OSI Routing Protocols ..................................................................................................1-22
Connectionless-mode Network Service Protocol ...................................................1-22
End System to Intermediate System Routing Exchange Protocol .........................1-23
vi
Configuration Reporting ...................................................................................1-23
Route Redirecting ............................................................................................1-24
Intermediate System to Intermediate System
Intra-Domain Routing Exchange Protocol ..............................................................1-26
Intra-Domain Routing ......................................................................................1-26
Inter-Domain Routing ......................................................................................1-28
Chapter 2
OSI Implementation Notes
Configuring Area Address Aliases ..................................................................................2-2
Correcting Area Partitions ..............................................................................................2-5
Configuring Static External Adjacencies ........................................................................2-7
Configuring OSI over DDN X.25 .....................................................................................2-7
Configuring DECnet IV to V Transition ............................................................................2-8
Configuring OSI over Frame Relay .................................................................................2-8
Configuration Overview ............................................................................................2-8
Frame Relay Circuit Modes ......................................................................................2-9
Direct Access .....................................................................................................2-9
Group Access ..................................................................................................2-10
Hybrid ..............................................................................................................2-11
Mixed Access ...................................................................................................2-11
Topology .................................................................................................................2-12
Full Mesh Topology ..........................................................................................2-12
Partial Mesh Topology .....................................................................................2-13
Route Redirecting ..................................................................................................2-14
Designated Router Selection .................................................................................2-15
IS Neighbor Detection ............................................................................................2-15
Circuits per Slot ......................................................................................................2-15
Chapter 3
Enabling OSI Services
Initial Configuration of OSI Services ........................................................................3-1
Chapter 4
Editing OSI Parameters
Accessing OSI Parameters .............................................................................................4-2
Editing OSI Global Parameters .......................................................................................4-3
vii
Editing OSI Interface Parameters .................................................................................4-13
Configuring Static End System Adjacencies ................................................................4-20
Adding a Static End System Adjacency .................................................................4-21
Copying a Static End System Adjacency ...............................................................4-24
Editing a Static End System Adjacency .................................................................4-24
Deleting a Static End System Adjacency ...............................................................4-24
Configuring Static External Address Adjacencies ........................................................4-25
Adding Static External Address Adjacencies .........................................................4-26
Copying Static External Address Adjacencies .......................................................4-29
Editing Static External Address Adjacencies .........................................................4-29
Deleting Static External Address Adjacencies .......................................................4-29
Configuring Static Routes .............................................................................................4-30
Adding Static Routes ..............................................................................................4-30
Copying Static Routes ............................................................................................4-33
Editing Static Routes ..............................................................................................4-33
Deleting Static Routes ............................................................................................4-34
Configuring DECnet IV to V Transition ..........................................................................4-34
Creating the DECnet IV to V Transition ..................................................................4-35
Editing the DECnet IV to V Transition Parameters .................................................4-35
Deleting DECnet IV to V Transition .........................................................................4-37
Deleting OSI from the Router .......................................................................................4-37
Appendix A
IP-to-X.121 Address Mapping for DDN
IP-to-X.121 Address Mapping ....................................................................................... A-2
Overview ................................................................................................................. A-2
Background ............................................................................................................. A-3
Standard IP to X.121 Address Mapping ........................................................................ A-7
Class A .................................................................................................................... A-7
Class B .................................................................................................................... A-9
Class C .................................................................................................................. A-10
Appendix B
Site Manager Default Settings for OSI
Index
ix
Figures
Figure 1-1. OSI Network Organization .......................................................................1-4
Figure 1-2. L1 Routing within an Area and L2 Routing between Areas .....................1-5
Figure 1-3. Hierarchical Addressing Authority Structure ............................................1-7
Figure 1-4. Basic NSAP Address Structure ...............................................................1-8
Figure 1-5. GOSIP NSAP Address Format ................................................................1-9
Figure 1-6. ANSI NSAP Address Format .................................................................1-11
Figure 1-7. NSAP Area Address ..............................................................................1-13
Figure 1-8. Campus Routing Domain .......................................................................1-14
Figure 1-9. Assigning NSAP Addresses ...................................................................1-16
Figure 1-10. Router 1 Floods Area A with LSPs about the new End System ............1-19
Figure 1-11. Lowest Cost Path (Router A to B to ES) ................................................1-21
Figure 1-12. Route Redirecting ..................................................................................1-25
Figure 1-13. Static Inter-Domain Routing ...................................................................1-27
Figure 2-1. Original Area Addresses for Area XY ......................................................2-2
Figure 2-2. Assign Area Address Alias 456 to All Routers in Area XY .......................2-3
Figure 2-3. Assign Area Address 456 to Specific End Systems .................................2-4
Figure 2-4. Divide Area XB into Area X and Area Y ...................................................2-5
Figure 2-5. Routers B and C in an Area Partition Due to Improper
Network Design .......................................................................................2-6
Figure 2-6. Frame Relay Direct Access Mode ..........................................................2-10
Figure 2-7. Frame Relay Group Access Mode .........................................................2-11
Figure 2-8. Frame Relay Mixed Access Modes (Direct and Group) .........................2-12
Figure 2-9. Full Mesh Topology ................................................................................2-13
Figure 2-10. Partial Mesh in Hub and Spoke Topology ..............................................2-14
Figure 3-1. OSI Configuration Window .......................................................................3-2
Figure 4-1. Configuration Manager Window ...............................................................4-2
Figure 4-2. Edit OSI Global Parameters Window .......................................................4-4
Figure 4-3. OSI Interface Lists Window ....................................................................4-13
x
Figure 4-4. OSI Static ES Adjacency List Window ...................................................4-21
Figure 4-5. OSI Static ES Adjacency Configuration Window ...................................4-22
Figure 4-6. OSI External Address Adjacency List Window ......................................4-25
Figure 4-7. OSI External Address Adjacency Configuration Window .......................4-26
Figure 4-8. OSI Static Routes Window .....................................................................4-30
Figure 4-9. Static Route Configuration Window .......................................................4-31
Figure 4-10. Selecting Protocols‘OSI‘Create DECnet IV to V Transition ....................4-35
Figure 4-11. Edit DECnet IV to V Transition Parameters Window ..............................4-36
Figure A-1. Class A Internet Address ........................................................................ A-4
Figure A-2. Class B Internet Address ........................................................................ A-5
Figure A-3. Class C Internet Address ........................................................................ A-6
xi
Tables
Table 1-1. OSI Reference Model and Common ISO Standards ...............................1-3
Table 1-2. NSAP Address Structure (Assigned by the ICD 0005 Subdomain) .......1-10
Table 1-3. NSAP Address Structure (Assigned by the DCC 840 Subdomain) .......1-12
Table 1-4. Link State Packet Types .........................................................................1-18
Table 2-1. Frame Relay Modes Used for OSI IS-IS Operations ................................2-9
Table 4-1. Suggested OSI Circuit Cost Values .......................................................4-15
Table B-1. OSI Initial Configuration Parameters ....................................................... B-1
Table B-2. OSI Global Parameters ........................................................................... B-1
Table B-3. OSI Interface Parameters ....................................................................... B-2
Table B-4. OSI Static ES Adjacency Parameters ..................................................... B-3
Table B-5. OSI External Adjacency Parameters ...................................................... B-3
Table B-6. OSI Static Routes ................................................................................... B-3
Table B-7. DECnet 4 to 5 Transition Parameters ...................................................... B-4
xiii
About This Guide
If you are responsible for configuring and managing Bay Networks routers, read
this guide to discover how to customize Bay Networks router software for OSI
services.
Refer to this guide for
An overview of the OSI routing protocol and a description of how Bay
Networks routing services work (Chapter 1)
Implementation notes on configuring Bay Networks OSI routers with special
network requirements (Chapter 2)
Instructions on
Enabling OSI services (Chapter 3)
Configuring and editing OSI parameters (Chapter 4)
Audience
Written for system and network managers, this guide describes how to configure
the Bay Networks implementation of OSI services to suit your environment.
Before You Begin
Before using this guide, you must be familiar with the general configuration
procedures in
Configuring Routers.
Configuring OSI Services
xiv
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xv
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Configuring OSI Services
xvi
Conventions
This section describes the conventions used in this guide.
angle brackets (< >) Indicate that you choose the text to enter based on the
description inside the brackets. Do not type the
brackets when entering the command. Example: if
command syntax is
ping
<ip_address>
, you enter
ping
192.32.10.12
arrow character (
) Separates menu and option names in instructions.
Example: Protocols
AppleTalk identifies the
AppleTalk option in the Protocols menu.
bold text
Indicates text that you need to enter and command
names in text. Example: Use the
dinfo
command.
brackets ([ ]) Indicate optional elements. You can choose none, one,
or all of the options.
italic text
Indicates variable values in command syntax
descriptions, new terms, file and directory names, and
book titles.
quotation marks (“ ”) Indicate the title of a chapter or section within a book.
screen text
Indicates data that appears on the screen. Example:
Set
Bay Networks Trap Monitor Filters
ellipsis points Horizontal (. . .) and vertical ellipsis points indicate
omitted information.
vertical line (|) Indicates that you enter only one of the parts of the
command. The vertical line separates choices. Do not
type the vertical line when entering the command.
Example: If the command syntax is
show at routes
|
nets
,
you enter either
show at routes
or
show at nets
, but not both.
.
.
.
()
xvii
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Acronyms
AAI Administrative Authority Identifier
ACSE Association Control Service Element
AFI Authority and Format Identifier
ANSI American National Standards Institute
ARP Address Resolution Protocol
ASN.1 Abstract Syntax Notation One
CLNP Connectionless Network Protocol
CLNS Connectionless-mode Network Service
CSNP Complete Sequence Number Packets
DCA Defense Communication Agency
DCC Data Country Code
DCE Data-Circuit Terminating Equipment
DDN Defense Data Network
DFI Domain Format Identifier
DLCI Data Link Connection Identifier
DSP Domain Specific Part
DTE Data-Circuit Terminating Equipment
ES-IS End System to Intermediate System
FDDI Fiber Distributed Data Interface
FTAM File Transfer Access Management
GOSIP Government OSI Profile
GSA General Services Administration
Configuring OSI Services
xviii
HDLC High Level Data Link Control
ICD International Code Designator
IDI Initial Domain Identifier
IDP Initial Domain Part
IEEE Institute of Electrical and Electronic Engineers
ILI Intelligent Link Interface
IP Internet Protocol
IS-IS Intermediate System to Intermediate System
ISO International Organization for Standardization
ITU-T International Telecommunications Union -
Telecommunication Standardization Sector
L1 Level 1
L2 Level 2
LAN local area network
LSP Link State Packet
MAC Media Access Control
MIB Management Information Base
MOM Maintenance Operations Module
MOP Maintenance Operations Protocol
OSI Open Systems Interconnection
NSAP Network Service Access Point
PDN Public Data Network
PPP Point-to-Point Protocol
PSNP Partial Sequence Number Packet
PVC Permanent Virtual Circuit
RFC Request for Comment
RIP Routing Information Protocol
SNAP Subnetwork Access Protocol
SNMP Simple Network Management Protocol
SNPA Subnetwork Point of Attachment
TCP Transmission Control Protocol
VT Virtual Terminal
1-1
Chapter 1
OSI Overview
This chapter provides a general OSI networking overview and describes how OSI
routing services for Bay Networks routers work. It includes information on OSI
Network organization
Level 1 and Level 2 routing
Network addressing
Link-state routing algorithm
Routing protocols
Note:
This document uses the terms
intermediate system
and
router
interchangeably.
Configuring OSI Services
1-2
OSI Basic Reference Model
OSI is a nonproprietary distributed processing architecture. The International
Organization for Standardization (ISO) developed OSI to provide communication
standards. These standards allow computer systems from different vendors to
communicate.
The OSI basic reference model combines a structured computer system
architecture with a set of common communication protocols. It comprises seven
layers. Each layer provides specific functions or services and follows the
corresponding OSI communication protocols to perform those services.
OSI is an “open system” architecture. Peer-to-peer common layers between
systems abolish the vendor-specific restrictions imposed by other architectures.
The principles of the OSI layering scheme include the following:
Similar services are on the same layer.
Services provided by lower layers are transparent to the layers above it.
The lower the layer, the more basic the services it provides.
The higher layers build upon the services offered by the layers below them.
OSI services for Bay Networks Version 7.60 and later software are United States
Government OSI Profile (GOSIP) Version 2.0 compliant. In addition, Bay
Networks router software provides support for the first three layers of the
ISO/CCITT (now ITU-T) recommended set of standards for international open
systems support and vendor interoperability. These layers are physical, data link,
and network.
T
able 1-1 lists some of the most common ISO standards implemented by OSI.
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Avaya Configuring OSI Services User manual

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